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Hanna M, Elnassag SS, Mohamed DH, Elbaset MA, Shaker O, Khowailed EA, Gouda SAA. Melatonin and mesenchymal stem cells co-administration alleviates chronic obstructive pulmonary disease via modulation of angiogenesis at the vascular-alveolar unit. Pflugers Arch 2024; 476:1155-1168. [PMID: 38740599 PMCID: PMC11166745 DOI: 10.1007/s00424-024-02968-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/31/2024] [Accepted: 04/25/2024] [Indexed: 05/16/2024]
Abstract
Chronic obstructive pulmonary disease (COPD) is considered a severe disease mitigating lung physiological functions with high mortality outcomes, insufficient therapy, and pathophysiology pathways which is still not fully understood. Mesenchymal stem cells (MSCs) derived from bone marrow play an important role in improving the function of organs suffering inflammation, oxidative stress, and immune reaction. It might also play a role in regenerative medicine, but that is still questionable. Additionally, Melatonin with its known antioxidative and anti-inflammatory impact is attracting attention nowadays as a useful treatment. We hypothesized that Melatonin may augment the effect of MSCs at the level of angiogenesis in COPD. In our study, the COPD model was established using cigarette smoking and lipopolysaccharide. The COPD rats were divided into four groups: COPD group, Melatonin-treated group, MSC-treated group, and combined treated group (Melatonin-MSCs). We found that COPD was accompanied by deterioration of pulmonary function tests in response to expiratory parameter affection more than inspiratory ones. This was associated with increased Hypoxia inducible factor-1α expression and vascular endothelial growth factor level. Consequently, there was increased CD31 expression indicating increased angiogenesis with massive enlargement of airspaces and thinning of alveolar septa with decreased mean radial alveolar count, in addition to, inflammatory cell infiltration and disruption of the bronchiolar epithelial wall with loss of cilia and blood vessel wall thickening. These findings were improved significantly when Melatonin and bone marrow-derived MSCs were used as a combined treatment proving the hypothesized target that Melatonin might augment MSCs aiming at vascular changes.
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Affiliation(s)
- Mira Hanna
- Department of Medical Physiology, Faculty of Medicine, Kasr Al-Ainy, Cairo University, El-Maniel 11451, Cairo, Egypt.
| | - Sabreen Sayed Elnassag
- Department of Medical Physiology, Faculty of Medicine, Kasr Al-Ainy, Cairo University, El-Maniel 11451, Cairo, Egypt
| | - Dina Hisham Mohamed
- Department of Histology, Faculty of Medicine, Cairo University, El-Maniel 11451, Cairo, Egypt
| | - Marawan Abd Elbaset
- Department of Pharmacology, Medical Research and Clinical Studies Institute, National Research Centre, Cairo, Egypt
| | - Olfat Shaker
- Department of Biochemistry, Faculty of Medicine, Kasr Al-Ainy, Cairo University, El-Maniel 11451, Cairo, Egypt
| | - Effat A Khowailed
- Department of Medical Physiology, Faculty of Medicine, Kasr Al-Ainy, Cairo University, El-Maniel 11451, Cairo, Egypt
| | - Sarah Ali Abdelhameed Gouda
- Department of Medical Physiology, Faculty of Medicine, Kasr Al-Ainy, Cairo University, El-Maniel 11451, Cairo, Egypt
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Jurjus A, El Masri J, Ghazi M, El Ayoubi LM, Soueid L, Gerges Geagea A, Jurjus R. Mechanism of Action of Melatonin as a Potential Adjuvant Therapy in Inflammatory Bowel Disease and Colorectal Cancer. Nutrients 2024; 16:1236. [PMID: 38674926 PMCID: PMC11054672 DOI: 10.3390/nu16081236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024] Open
Abstract
Inflammatory bowel disease (IBD), a continuum of chronic inflammatory diseases, is tightly associated with immune system dysregulation and dysbiosis, leading to inflammation in the gastrointestinal tract (GIT) and multiple extraintestinal manifestations. The pathogenesis of IBD is not completely elucidated. However, it is associated with an increased risk of colorectal cancer (CRC), which is one of the most common gastrointestinal malignancies. In both IBD and CRC, a complex interplay occurs between the immune system and gut microbiota (GM), leading to the alteration in GM composition. Melatonin, a neuroendocrine hormone, was found to be involved with this interplay, especially since it is present in high amounts in the gut, leading to some protective effects. Actually, melatonin enhances the integrity of the intestinal mucosal barrier, regulates the immune response, alleviates inflammation, and attenuates oxidative stress. Thereby, the authors summarize the multifactorial interaction of melatonin with IBD and with CRC, focusing on new findings related to the mechanisms of action of this hormone, in addition to its documented positive outcomes on the treatment of these two pathologies and possible future perspectives to use melatonin as an adjuvant therapy.
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Affiliation(s)
- Abdo Jurjus
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon; (J.E.M.); (M.G.); (L.S.); (A.G.G.); (R.J.)
| | - Jad El Masri
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon; (J.E.M.); (M.G.); (L.S.); (A.G.G.); (R.J.)
- Faculty of Medical Sciences, Lebanese University, Beirut 6573, Lebanon;
| | - Maya Ghazi
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon; (J.E.M.); (M.G.); (L.S.); (A.G.G.); (R.J.)
- Faculty of Medical Sciences, Lebanese University, Beirut 6573, Lebanon;
| | | | - Lara Soueid
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon; (J.E.M.); (M.G.); (L.S.); (A.G.G.); (R.J.)
| | - Alice Gerges Geagea
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon; (J.E.M.); (M.G.); (L.S.); (A.G.G.); (R.J.)
| | - Rosalyn Jurjus
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon; (J.E.M.); (M.G.); (L.S.); (A.G.G.); (R.J.)
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Račkauskas R, Lukšaitė-Lukštė R, Stulpinas R, Baušys A, Paškonis M, Kvietkauskas M, Sokolovas V, Laurinavičius A, Strupas K. The Impact of Chemotherapy and Transforming Growth Factor-β1 in Liver Regeneration after Hepatectomy among Colorectal Cancer Patients. J Pers Med 2024; 14:144. [PMID: 38392578 PMCID: PMC10890619 DOI: 10.3390/jpm14020144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/19/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
An ongoing debate surrounds the impact of chemotherapy on post-hepatectomy liver regeneration in patients with colorectal cancer liver metastases (CRLM), with unclear regulatory mechanisms. This study sought to delve into liver regeneration post-resection in CRLM patients, specifically examining the roles of hepatocyte growth factor (HGF) and transforming growth factor β1 (TGF-β1). In this longitudinal observational study, 17 patients undergoing major liver resection for CRLM and 17 with benign indications as controls were enrolled. Liver regeneration within 30 postoperative days was assessed via CT, considering clinicopathological characteristics, liver enzymes, liver stiffness by elastography, and the impact of HGF and TGF-β1 on liver regeneration. The results revealed that the control group exhibited significantly higher mean liver regeneration volume (200 ± 180 mL) within 30 days postoperatively compared to the CRLM group (72 ± 154 mL); p = 0.03. Baseline alkaline phosphatase (AP) and TGF-β1 blood levels were notably higher in the CRLM group. Immunohistochemical analysis indicated a higher proportion of CRLM patients with high TGF-β1 expression in liver tissues compared to the control group (p = 0.034). Correlation analysis showed that resected liver volume, baseline plasma HGF, AP, and albumin levels significantly correlated with liver regeneration volume. However, in multivariable analysis, only resected liver volume (β: 0.31; 95% CI: 0.14-0.47, p = 0.01) remained significant. In conclusion, this study highlights compromised liver regeneration in CRLM patients post-chemotherapy. Additionally, these patients exhibited lower serum TGF-β1 levels and reduced TGF-β1 expression in liver tissue, suggesting TGF-β1 involvement in mechanisms hindering liver regeneration capacity following major resection after chemotherapy.
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Affiliation(s)
- Rokas Račkauskas
- Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Ciurlionio Str. 21, LT-03101 Vilnius, Lithuania
| | - Raminta Lukšaitė-Lukštė
- Department of Radiology, Nuclear Medicine and Medical Physics, Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, LT-03101 Vilnius, Lithuania
| | - Rokas Stulpinas
- Department of Pathology, Forensic Medicine and Pharmacology, Vilnius University, LT-03101 Vilnius, Lithuania
- National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, LT-08406 Vilnius, Lithuania
| | - Augustinas Baušys
- Department of Pathology, Forensic Medicine and Pharmacology, Vilnius University, LT-03101 Vilnius, Lithuania
| | - Marius Paškonis
- Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Ciurlionio Str. 21, LT-03101 Vilnius, Lithuania
| | - Mindaugas Kvietkauskas
- Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Ciurlionio Str. 21, LT-03101 Vilnius, Lithuania
| | - Vitalijus Sokolovas
- Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Ciurlionio Str. 21, LT-03101 Vilnius, Lithuania
| | - Arvydas Laurinavičius
- Department of Pathology, Forensic Medicine and Pharmacology, Vilnius University, LT-03101 Vilnius, Lithuania
- National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, LT-08406 Vilnius, Lithuania
| | - Kęstutis Strupas
- Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Ciurlionio Str. 21, LT-03101 Vilnius, Lithuania
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Xu F, Jiang HL, Feng WW, Fu C, Zhou JC. Characteristics of amino acid metabolism in colorectal cancer. World J Clin Cases 2023; 11:6318-6326. [PMID: 37900242 PMCID: PMC10601002 DOI: 10.12998/wjcc.v11.i27.6318] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/16/2023] [Accepted: 08/18/2023] [Indexed: 09/20/2023] Open
Abstract
In recent years, metabolomics research has become a hot spot in the screening and treatment of cancer. It is a popular technique for the quantitative characterization of small molecular compounds in biological cells, tissues, organs or organisms. Further study of the tumor revealed that amino acid changes may occur early in the tumor. The rapid growth and metabolism required for survival result in tumors exhibiting an increased demand for amino acids. An abundant supply of amino acids is important for cancer to maintain its proliferative driving force. Changes in amino acid metabolism can be used to screen malignant tumors and improve therapeutic outcomes. Therefore, it is particularly important to study the characteristics of amino acid metabolism in colorectal cancer. This article reviews several specific amino acid metabolism characteristics in colorectal cancer.
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Affiliation(s)
- Fen Xu
- Department of Gastroenterology, Xinhua Hospital Affiliated to Dalian University, Dalian 116000, Liaoning Province, China
| | - Hong-Liang Jiang
- Department of Gastroenterology, Xinhua Hospital Affiliated to Dalian University, Dalian 116000, Liaoning Province, China
| | - Wei-Wei Feng
- Department of Gastroenterology, Xinhua Hospital Affiliated to Dalian University, Dalian 116000, Liaoning Province, China
| | - Chen Fu
- Department of Gastroenterology, Xinhua Hospital Affiliated to Dalian University, Dalian 116000, Liaoning Province, China
| | - Jiang-Chang Zhou
- Department of Gastroenterology, Xinhua Hospital Affiliated to Dalian University, Dalian 116000, Liaoning Province, China
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Jakubauskas M, Jakubauskiene L, Leber B, Horvath A, Strupas K, Stiegler P, Schemmer P. Probiotic Supplementation Attenuates Chemotherapy-Induced Intestinal Mucositis in an Experimental Colorectal Cancer Liver Metastasis Rat Model. Nutrients 2023; 15:nu15051117. [PMID: 36904117 PMCID: PMC10005486 DOI: 10.3390/nu15051117] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 02/14/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
The use of chemotherapeutic agents is of paramount importance when treating colorectal cancer (CRC). Unfortunately, one of the most frequent chemotherapy (CTx) side effects is intestinal mucositis (IM), which may present with several clinical symptoms such as nausea, bloating, vomiting, pain, and diarrhea and even can result in life-threatening complications. There is a focused scientific effort towards developing new therapies to prevent and treat IM. The aim of this study was to assess the outcomes of probiotic supplementation on CTx-induced IM in a CRC liver metastasis rat model. Six-week-old male Wistar rats received either a multispecies probiotic or placebo mixture. On the 28th experiment day, rats received FOLFOX CTx, and afterwards, the severity of diarrhea was evaluated twice daily. Stool samples were collected for further microbiome analysis. Additionally, immunohistochemical stainings of ileum and colon samples with were performed with MPO, Ki67, and Caspase-3 antibodies. Probiotic supplementation alleviates the severity and length of CTx-induced diarrhea. Additionally, probiotics significantly reduced FOLFOX-induced weight and blood albumin loss. Furthermore, probiotic supplementation mitigated CTx-induced histological changes in the gut and promoted intestinal cell regeneration. This study shows that multispecies probiotic supplementation attenuates FOLFOX-induced IM symptoms by inhibiting apoptosis and promoting intestinal cell proliferation.
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Affiliation(s)
- Matas Jakubauskas
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria
- Faculty of Medicine, Vilnius University, M. K. Ciurlionio str. 21, 03101 Vilnius, Lithuania
| | - Lina Jakubauskiene
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria
- Faculty of Medicine, Vilnius University, M. K. Ciurlionio str. 21, 03101 Vilnius, Lithuania
| | - Bettina Leber
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria
| | - Angela Horvath
- Division of Gastroenterology and Hepatology, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria
| | - Kestutis Strupas
- Faculty of Medicine, Vilnius University, M. K. Ciurlionio str. 21, 03101 Vilnius, Lithuania
| | - Philipp Stiegler
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria
- Correspondence: ; Tel.: +43-316-385-84094
| | - Peter Schemmer
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria
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Gong YQ, Hou FT, Xiang CL, Li CL, Hu GH, Chen CW. The mechanisms and roles of melatonin in gastrointestinal cancer. Front Oncol 2022; 12:1066698. [PMID: 36591447 PMCID: PMC9798083 DOI: 10.3389/fonc.2022.1066698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/29/2022] [Indexed: 12/23/2022] Open
Abstract
Gastrointestinal (GI) cancer is a global health problem with wide lesions and numerous cases. The increased morbidity and mortality of GI cancer is a socio-economic challenge for decades to come. Melatonin, a nature indolamine, exerts a crucial role in molecular interactions involved in multiple functional and physiological processes. Increasing evidence indicates that melatonin can modulate GI tract, decrease the occurrence of GI cancer, and enhance the sensitivity to chemoradiotherapy. However, little is known about the exact role of melatonin in anti-carcinogenesis. In this review, we discuss the action of the beneficial effects of melatonin in GI carcinogenesis. Furthermore, we compile the understanding of the role of melatonin in GI cancer, including esophageal cancer (EC), gastric cancer (GC), hepatocellular carcinoma (HCC), colorectal cancer (CRC), and pancreatic cancer (PC). In addition, the potential therapeutic application and clinical evaluation of melatonin in GI cancer are also discussed.
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Affiliation(s)
- Yong-Qiang Gong
- Department of Gastrointestinal Surgery, Hunan Provincial People’s Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China
| | - Fu-Tao Hou
- Department of Gastrointestinal Surgery, Hunan Provincial People’s Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China
| | - Cai-Ling Xiang
- Department of Gastrointestinal Surgery, Hunan Provincial People’s Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China
| | - Cheng-Long Li
- Department of Gastrointestinal Surgery, Hunan Provincial People’s Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China
| | - Guo-Huang Hu
- Department of General Surgery, Institute of Digestive Surgery of Changsha, Affiliated Changsha Hospital of Hunan Normal University, Changsha, Hunan, China,*Correspondence: Guo-Huang Hu, ; Chao-Wu Chen,
| | - Chao-Wu Chen
- Department of Gastrointestinal Surgery, Hunan Provincial People’s Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China,*Correspondence: Guo-Huang Hu, ; Chao-Wu Chen,
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Jakubauskas M, Jakubauskiene L, Leber B, Horvath A, Strupas K, Stiegler P, Schemmer P. Probiotic Supplementation Suppresses Tumor Growth in an Experimental Colorectal Cancer Liver Metastasis Model. Int J Mol Sci 2022; 23:ijms23147674. [PMID: 35887022 PMCID: PMC9317910 DOI: 10.3390/ijms23147674] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/05/2022] [Accepted: 07/11/2022] [Indexed: 11/16/2022] Open
Abstract
Colorectal cancer (CRC) ranks third in incidence and second in mortality of all cancers worldwide. At the time of primary diagnosis, around 20% of patients already have metastatic CRC and only around 20% are candidates for radical resection. Thus, most of the patients have to undergo chemotherapy (CTx). Due to chemoresistance and side effects, novel treatment additives are crucial for controlling the disease and prolonging patient survival. The aim of this study was to evaluate probiotic supplementation and its antitumorigenic effects in an experimental CRC liver metastasis model. Six-week-old male Wistar rats received either a multispecies probiotic (1.2 × 109 CFU/daily) or placebo mixture. On day 14 of the experiment, rat CRC cells (CC531) were implanted under the liver capsule later treated by FOLFOX CTx. Change in tumor volume was measured by performing micro computed tomography (micro-CT) scanning on experimental days 28 and 34. Additionally, immunohistochemical staining with anti-MPO, anti-Ki67, and anti-CD31 were performed. Tumor apoptosis was evaluated using TUNEL staining. Micro-CT image analysis indicates that probiotic supplementation significantly inhibits tumor growth. No synergistic effects between probiotic supplementation and FOLFOX CTx was observed. Reduced tumor volume was achieved by inhibiting angiogenesis, as tumor microvascular density was significantly lower in rats receiving probiotic supplementation. This study shows that a multispecies probiotic mixture significantly reduces angiogenesis and inhibits CRC liver metastasis growth in an experimental rat model.
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Affiliation(s)
- Matas Jakubauskas
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria; (M.J.); (L.J.); (B.L.); (P.S.)
- Faculty of Medicine, Vilnius University, M. K. Ciurlionio Str. 21, 03101 Vilnius, Lithuania;
| | - Lina Jakubauskiene
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria; (M.J.); (L.J.); (B.L.); (P.S.)
- Faculty of Medicine, Vilnius University, M. K. Ciurlionio Str. 21, 03101 Vilnius, Lithuania;
| | - Bettina Leber
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria; (M.J.); (L.J.); (B.L.); (P.S.)
| | - Angela Horvath
- Division of Gastroenterology and Hepatology, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria;
| | - Kestutis Strupas
- Faculty of Medicine, Vilnius University, M. K. Ciurlionio Str. 21, 03101 Vilnius, Lithuania;
| | - Philipp Stiegler
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria; (M.J.); (L.J.); (B.L.); (P.S.)
- Correspondence: ; Tel.: +43-316-385-84094
| | - Peter Schemmer
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Auenbruggerplatz 2, 8036 Graz, Austria; (M.J.); (L.J.); (B.L.); (P.S.)
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Melatonin and Glycine Reduce Uterus Ischemia/Reperfusion Injury in a Rat Model of Warm Ischemia. Int J Mol Sci 2021; 22:ijms22168373. [PMID: 34445081 PMCID: PMC8394613 DOI: 10.3390/ijms22168373] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/29/2021] [Accepted: 08/01/2021] [Indexed: 01/01/2023] Open
Abstract
Ischemia/reperfusion injury (IRI) remains a significant problem to be solved in uterus transplantation (UTx). Melatonin and glycine have been shown to possess direct cytoprotective activities, mainly due to their antioxidative and anti-inflammatory properties. The aim of this study was to investigate the protective effects of melatonin and glycine and their combination on IRI in a rat model of warm ischemia. In this study, Sprague-Dawley rats were assigned to eight groups, including sham and IRI (n = 80). Melatonin and glycine alone or their combination were administered prior to 1 h of uterus ischemia followed by 1 h of reperfusion. Melatonin (50 mg/kg) was administered via gavage 2 h before IRI and glycine in an enriched diet for 5 days prior to intervention. Uterus IRI was estimated by histology, including immunohistochemistry, and biochemical tissue analyses. Histology revealed that uterus IRI was significantly attenuated by pretreatment with melatonin (p = 0.019) and glycine (p = 0.044) alone as well as their combination (p = 0.003). Uterus IRI led to increased myeloperoxidase expression, which was significantly reduced by melatonin (p = 0.004), glycine (p < 0.001) or their combination (p < 0.001). The decline in superoxide dismutase activity was significantly reduced in the melatonin (p = 0.027), glycine (p = 0.038) and combined treatment groups (p = 0.015) when compared to the IRI control group. In conclusion, melatonin, glycine and their combination significantly reduced oxidative stress-induced cell damage after IRI in a small animal warm ischemia model, and, therefore, clinical studies are required to evaluate the protective effects of these well-characterized substances in uterus IRI.
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